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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>James,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>This is from the eQuest help file:<o:p></o:p></span></p>
<h5>OA-FLOW/AREA<o:p></o:p></h5>
<p class=MsoBodyText>This keyword allows the specification of a minimum zone
outside air (OA) flow rate per unit of zone floor area. The use of
OUTSIDE-AIR-FLOW will over ride the value of this keyword. <b>The maximum
of values resulting from OA-FLOW/AREA, OA-FLOW/PER, and OA-CHANGES will be used
unless an over-ride value for OUTSIDE-AIR-FLOW is specified.</b><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> I’ve also tested this out by varying the OA-FLOW/PER
in a model I’ve worked on. The total energy consumption didn’t
change, which suggested that my cfm/area rate was producing the larger cfm
requirement and the program ignored my cfm/person rate.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> James Hansen [mailto:JHANSEN@ghtltd.com] <br>
<b>Sent:</b> April 28, 2010 2:08 PM<br>
<b>To:</b> Victor Yeung; Otto Schwieterman<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> RE: [Equest-users] Demand Controlled Ventilation<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>“However, the way eQuest calculates min zone OA is by
taking the higher value of either OA-FLOW/PER or OA-FLOW/AREA, not the combine
total. To correctly model the OA requirement, I have to calculate the
combine OA rate (i.e. {[cfm/per * max # of person] + [cfm/area * floor area] }
/ floor area) and input that value in OA-FLOW/AREA.”<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:
"Calibri","sans-serif";color:#1F497D'>Are you sure about that Victor?
Last time I checked, when I input 5 CFM / person and 0.06 CFM / square foot,
the minimum zone OA was the SUM of these two values. In which case you
can model DCV without having to use that option in the system tab. eQuest
will automatically size the 5 CFM / person portion of the outside air based on
the occupancy diversity. Am I wrong here?<o:p></o:p></span></b></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:
"Arial","sans-serif";color:teal'>GHT Limited<br>
</span></b><b><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif"'><ns0:PersonName><span
style='color:black'>James Hansen</span></ns0:PersonName></span></b><b><span
lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'>, PE, LEED AP<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Arial","sans-serif";color:black'>Senior Associate</span></b><b><span
lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'><o:p></o:p></span></b></p>
<p class=MsoNormal><span lang=EN-US style='font-size:7.5pt;font-family:"Arial","sans-serif"'><ns0:Street><ns0:address><span
style='color:black'>1010 N. Glebe Rd, Suite 200</span></ns0:address></ns0:Street></span><span
lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:7.5pt;font-family:"Arial","sans-serif"'><ns0:place><ns0:City><span
style='color:black'>Arlington</span></ns0:City><span style='color:black'>, </span><ns0:State><span
style='color:black'>VA</span></ns0:State><span style='color:black'> </span><ns0:PostalCode><span
style='color:black'>22201-4749</span></ns0:PostalCode></ns0:place></span><span
lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:black'>703-338-5754 (Cell)</span><span lang=EN-US style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:7.5pt;font-family:"Arial","sans-serif";
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color:teal'><a href="http://www.ghtltd.com/"><span style='font-size:10.0pt'>www.ghtltd.com</span></a><o:p></o:p></span></p>
<p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:
"Calibri","sans-serif";color:#31849B'><o:p> </o:p></span></b></p>
</div>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> Victor Yeung
[mailto:Victor@invirosystems.ca] <br>
<b>Sent:</b> Wednesday, April 28, 2010 12:30 PM<br>
<b>To:</b> Bishop, Bill; Rob Hudson<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Demand Controlled Ventilation</span><span
lang=EN-US><o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hello all,</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I also have a similar question related to minimum OA settings for
DCV, particularly with OA-FLOW/PER and OA-FLOW/AREA. Say I am using
ASHRAE 62.1 for my OA rates, there are minimum requirements for cfm/person and
cfm/area. However, the way eQuest calculates min zone OA is by taking the
higher value of either OA-FLOW/PER or OA-FLOW/AREA, not the combine
total. To correctly model the OA requirement, I have to calculate the
combine OA rate (i.e. {[cfm/per * max # of person] + [cfm/area * floor area] }
/ floor area) and input that value in OA-FLOW/AREA. Now, the problem
comes in when we include DCV into the model, at which eQuest cannot calculate
the savings because the OA-FLOW/PER value is not entered. I would greatly
appreciate it if anyone can clarify this.</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p>
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=643
style='width:482.55pt;margin-left:1.45pt;border-collapse:collapse'>
<tr style='height:17.35pt'>
<td width=643 valign=top style='width:482.55pt;padding:2.9pt 1.45pt 2.9pt 1.45pt;
height:17.35pt'>
<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";
color:#1F497D;text-transform:uppercase;letter-spacing:.2pt'>VICTOR YEUNG, </span></b><i><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D;
letter-spacing:.2pt'>BASc, LEED® AP</span></i><o:p></o:p></p>
<p class=MsoNormal><i><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";
color:#1F497D;letter-spacing:.2pt'>EIT - LEED®/Sustainable Development</span></i><o:p></o:p></p>
<p class=MsoNormal><i><span style='font-size:8.0pt;font-family:"Cambria","serif";
color:#262626;letter-spacing:.2pt'><a href="mailto:victor@invirosystems...ca"><span
style='font-family:"Times New Roman","serif"'>victor@invirosystems.ca</span></a></span></i><o:p></o:p></p>
</td>
</tr>
</table>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> Bishop, Bill
[mailto:wbishop@pathfinder-ea.com] <br>
<b>Sent:</b> April 28, 2010 11:16 AM<br>
<b>To:</b> Rob Hudson<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Demand Controlled Ventilation</span><span
lang=EN-US><o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Rob,</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'> </span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>You need to set up an hourly report. See attached.</span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'> </span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Bill</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'> </span><span lang=EN-US><o:p></o:p></span></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><span lang=EN-US>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> Rob Hudson [mailto:rdh4176@gmail.com] <br>
<b>Sent:</b> Wednesday, April 28, 2010 11:06 AM<br>
<b>To:</b> Bishop, Bill<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Demand Controlled Ventilation</span><span
lang=EN-US><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US>How can i tell
if the system is using a lower OA CFM during the less occupied times? <o:p></o:p></span></p>
<div>
<p class=MsoNormal><span lang=EN-US>On Wed, Apr 28, 2010 at 10:43 AM, Bishop,
Bill <<a href="mailto:wbishop@pathfinder-ea.com">wbishop@pathfinder-ea.com</a>>
wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Rob,</span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>I
recently modeled DCV successfully for the first time. (I showed savings
anyway.) You need to enter zone-level OA as OA-FLOW/PER and/or OA-FLOW/AREA.
The OA flow/per (person) is what will get you the savings, based on your
occupancy schedule(s). I also created a MIN-AIR-SCH, coinciding with the fan
schedule, set to zero when fan is off and -999 when fan is on.</span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Regards,</span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Bill</span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span><span
lang=EN-US><o:p></o:p></span></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
lang=EN-US style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:black'>William Bishop, EIT, BEMP, LEED<sup>®</sup> AP </span></b><b><span
lang=EN-US style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:#006600'>|</span></b><b><span lang=EN-US style='font-size:10.0pt;
font-family:"Franklin Gothic Medium Cond","sans-serif";color:black'> Pathfinder
Engineers & Architects LLP</span></b><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'>Mechanical
Engineer</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:5.0pt;font-family:"Arial","sans-serif";color:black'> </span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:9.0pt;font-family:"Arial","sans-serif";color:navy'>134
South Fitzhugh Street</span><span lang=EN-US style='font-size:9.0pt;color:navy'><br>
</span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:navy'>Rochester, NY 14608</span><span lang=EN-US style='font-size:9.0pt;
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</span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:navy'>T: (585) 325-6004 </span><span lang=EN-US style='font-size:9.0pt;
font-family:"Arial","sans-serif";color:black'>Ext. 114</span><span lang=EN-US
style='color:navy'><br>
</span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:navy'>F: (585) 325-6005</span><span lang=EN-US><o:p></o:p></span></p>
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lang=EN-US style='color:green'> </span><span lang=EN-US style='font-size:7.5pt;
color:green'>Please strive to live sustainably.</span><span lang=EN-US><o:p></o:p></span></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a
href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Rob Hudson<br>
<b>Sent:</b> Wednesday, April 28, 2010 9:55 AM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Demand Controlled Ventilation</span><span
lang=EN-US><o:p></o:p></span></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>I am having some trouble with setting up DCV in my model. if i
select DCV in Zone Sensors for the Min OA Control Method and a min outside Air
Ratio, do i need any Zone level OA inputs?<br>
Any help or insight as to what inputs are necessary for DCV would be great!<br>
<br>
-- <br>
Rob Hudson<o:p></o:p></span></p>
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<p class=MsoNormal><span lang=EN-US><br>
<br>
<br>
-- <br>
Rob Hudson<o:p></o:p></span></p>
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